Limestone rock - a source of high purity calcium carbonate
Limestone rock - a source of high purity calcium carbonate

Our Products

superlon ground calcium carbonateSuperlon | Fine GCC
Fine, high purity ground calcium carbonate powders

longcal granular calcium carbonateLongcal | Granular GCC
High purity granular calcium carbonates

specialty products calcium oxide hydroxideSpeciality Products
Refox CaO, Hydralon Ca(OH)2, Fluromag MgO

ground agricultural limeAgricultural Lime
Limestone and dolomite for agricultural liming

dimensional stoneLandscaping Stone
Architectural, rockery and walling stone

longcliffe limestone aggregatesLongcliffe Aggregates
Clean, evently graded limestone aggregates

golconda dolomite aggregatesGolconda Aggregates
Decorative dolomite aggregates and grits

Limestone uses chart


High purity, granular calcium carbonate (GCC) products

Product Overview

The Longcal range of granular calcium carbonates is produced from very high purity Carboniferous Limestone at our company's Brassington Moor quarry and processing operations in Derbyshire. The material has been crushed, milled, dried and classified to produce products of exceptional purity and consistency available in a variety of sizes.

Applications of Longcal Granular Calcium Carbonate

Longcal Properties and Benefits

The typical physical properties of Longcal granular calcium carbonates are as follows:

Appearance grey/off white fine granules
Calcium Carbonate (%) 98.25 min
Specific Gravity 2.65
Moisture (%) 0.05
Available Grades/Sizes 300µm to 5mm
Tightly controlled granularity

For further information please consult the relevant technical data sheet.

Longcal Granular Calcium Carbonate Grades

Longcal is available in a wide range of grades and granularities ranging from 300Ám to 5mm, including grades that comply with British Standard specifications BS EN 6925:1988 (Aggregates for mastic asphalt) and BS EN 13043 (Aggregates for bituminous mixtures).

Our operations are fully accredited to ISO 9001 and ISO 14001. Datasheets and SDS on specific grades are available on request. Please contact us for further information.


Longcal Granular Calcium Carbonate is available in bulk, IBCs and sacks - palletised and shrunk wrapped if required.


Limestone (CAS: 1317-65-3 & EINECS: 215-279-6) is exempt from the obligation to pre-register under the REACH legislation. The exemption is granted in Annex V, Paragraph 7 as the material is a naturally occurring mineral found in nature.

Natural Chemistry...Pure Science

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